20621244163430 has 32 divisors (see below), whose sum is σ = 37732195781280. Its totient is φ = 8113167671040.

The previous prime is 20621244163361. The next prime is 20621244163451. The reversal of 20621244163430 is 3436144212602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68896556 + ... + 69195215.

It is an arithmetic number, because the mean of its divisors is an integer number (1179131118165).

Almost surely, 2^{20621244163430} is an apocalyptic number.

20621244163430 is a deficient number, since it is larger than the sum of its proper divisors (17110951617850).

20621244163430 is a wasteful number, since it uses less digits than its factorization.

20621244163430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138092024.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 20621244163430 in words is "twenty trillion, six hundred twenty-one billion, two hundred forty-four million, one hundred sixty-three thousand, four hundred thirty".